Wearing block for steel retainers



1931- c. c. HANSEN 1,789,101

WEARING BLOCK FOR STEEL RETAINERS I Filed Dec. 16, 1927 INVENTORL HIS A'T ORNEY' (Year! sallana'en' Patented Jan. 13, 1931 wearer PATENT orrics oHaBLEs Q-JHAINSEN, or'nas'ron,,rnnnsYr vAme,'nssreivon romennsonL-nann comrany, 0F JERSEY CITY, new JERSEY, a oonroaa'rron on NEW JERSEY-- 'WEARING'B LOGK roe STEEL nn'rarnnns Applicationfiled.December 16, 1927. Serial No. 240,485,.

g This invention relates to rock drills, but more particularly to a wearing block adapted to be attached to the yoke portion of; a steel retainer of the typeused for 'prevcnting ejection of the drill steel from the front head :ofthe drill. i y

The objects of theinvention are to profeet the steel retainer against the wearing action of the'dr'ill steel, to insurean equal distribution of the 'for'ce'o'f the blow of the working implement over the entire yoke portion or the retainer and to reclucebreakage of retainers of thistype to a minimum.

Other objects will be in part obvious and in part pointed out hereinafter. In the drawings illustrating a practical application of the invention,

Figure 1 is a sideelevation of a steel retainer having the invention applied thereto, Figure 2 isan end View of the wearing block and the retainer, v i

Figure 3 is an elevation showing another view of the wearing block, and

Figure 4 is an elevation. of the yoke portion of a retainer illustrating the manner in which the wearing block may be placed on the yoke. v

Referring, more particularly to the drawings, the invention is shown applied to a steel retainer A of the type shown and described in United States Patent No. 1,000,036 entitled Tool steel retainer for percussive tools; granted to lVilliam' Prellwitz August I 8, 1911. The steel retainer accordingly has a yoke B to encircle a drill steel forwardly of a collar or projectiontoact as an abut ment therefor for preventing ejection of such working implement from the rock drill whereby it is actuated. j

The yoke B is provided with side arms C to which it is connected by means of curved portions D. At the rearward endof the side arms C are formed spiral springs E. for absorbing the blows against theyoke',' and the inner coils F of the spiral springs E are shaped to receive trunnions or pivots carried by'the rock drill.

' "In accordance withthe present invention, means are provided for protecting the yoke portion B of the retainer Aagainst wearv 1 larg r; diameter than.

such collar sincefwh'en the collar offthe r inglthewearing.blocktofthe retainerLf In In assembling the fweaii ordinarily caused by the drill steel as well as to reenforce the yoke against the-effects of the blows of a drill steel thereagainst.

Tothis'ehda' wearing block G of U-shape is disposed on the yoke B. ,The wearing blockhas a peripheral groove H to conform to and receive the yoke B. On the sides of the groove Hare flanges J. and to engage the upper 'and'lower 'surfaces'L and 0 respectively of the yoke B. .The flange J terminates at a p'ointshortof the end of theweari'ngjbloclc and has 'on its gin'nern'iost. su'riiace curved surfaces '1?v to conform to'the 'ci'irvature 'ofthe'cui'ved por' v 3 t onl); This constructionalso enables the G5 wearing block to' be readily disposed i'on the yoke B, particularly on retainers such as that illustrated in which the side armsneantli'efyoke. converge toward eachother near the curvedportionl f ',f y ,5; Preferably av depression Q 'islforme'djin the, uppermost surface of v the wearing block G to form a seat forthe collar llSl ally' prorided. on workingimplements. The depres} 'sion Q, 'is of cylindricalformation ofslig t; I l i he ,collarjwhicliIit.

. is adaptedgtofaccomriiodate and. the Wall R.

of said serve to prevent oscillationof the reta ner'froni the pathof R. ei iisngag the s nar,

working implement rests on its seat, the wall Convenient means are ip iiQvi de d. forfsecu ifliarr t nsane LQ Q'Q ahQQK; clipS wh ch may befcr niped against the rearward surface ot-thefl yoke B to .mainta n the wearing bloclr on the yoke-ar a also to hold. it against inovementiw'ith respect to yoke. "YA slot. T iiitlie wearinghlock may 96 size to accommodate workf be of any suitable ingimp ements. f; the typeandj ize aster-11y used in connection with roclr drills; in'gl retainers ot thisftyp e. V r I 'iiglblbcklori the retainerithe wearing'zblockl mayfirstlloe disf posed between I the side arinsfG' in appr'oxi inatel'y tlieQ position: illustrate in Figure l when-used on aretainer suclras thatjllustratei a flil 1 0s. ion 3 the peripheral 50 V V wearing block havin a peripheral grooveto groove H will engage the curved portion D of the side arms C and the Wearing block may then be readily moved into its proper operative position. After the wearing block has beenthus disposed on the yoke 13, the clip S may be crimped around the yoke to seripre the Wearing block immovably on the yo e. V

' Bymeans of the present invention, the yoke B of the retainer will: be fully protected against ,the wearing action of the drill' tributed over theentire areaof the yoke.

I claim: U a

1. In; combination with a steel retainer having a yoke, means adapted to be attached to the yoke for protecting said yoke against the percussion of a drill steel collar. I 2. In 'combination' with a steel retainer having a yoke, a wearing'block for protecting the yoke'against the percussive wearing action of the collar of a drill steel, said wearing block having a groove, to receive the yoke, and a clip on the wearing block for i I securing said wearing block to theyoke.

3. In combination with a steel retainer having a yoke, a wearing block for protecting the yoke against'the percussive wearing action of tlieeollar of a drill steel, said wearing block having a peripheral groove to the Wearing block adapted to be crimped against the yoke for holding the wearing block onthe yoke, said clip being located on one sideof the peripheral groove. 7

6. In combination with a steel retainer having ayoke, a U-shaped wearing block for protecting the yoke against the effect of the blows of a drill steel, flanges on the wearing block to engage the upper and lower surfaces of the; yoke, a depression in OHQFGIlCl or, the wearing block to 'form' a seat for thezcollar of a drill steel, and a clip on one flange crimped against the yoke for holding the wearing block on the yoke.

7. In combination with a steel retainer having a yoke, a wearing block for protecting the yoke against'the eflect of the blows of a drill steel, said block fitting between the yoke and drill steel. g 8. In combination; with a steel retainer having a yoke, ajwearing block for protect ing the yoke against the effect of the blows of a drill steel, said block fitting between the yoke and drill steel, and securing means,

in the block extending around the yoke to secure them one to the other.

In testimony whereof I have signed this specification.

' CHARLES C. I-LANSEN.v

receive the yoke, and a clip onthe wearing 7 block adapted to be crimped against one side of the yoke for holding'the wearing block on theyoke. 7

' 4. In combinationwith a steel retainer having ayoke, a wearing block for protecting the yoke against thepercussive wearing action of the collar ofa drill'steel, said receive the yoke, a" epression in the end of the wearing block to form' a seat "for the collar of a drill steel,and a ,cliplon theside' of the wearing block adapted. to .be crimped against the yoke block on theyoke.

V for holding the swearing 5'. In comb'nation with a steel retainer havinga yoke, a u-shaped wearing block j for protecting the yoke against the percus-.

sive wearing actio'n of the collarof a drill 7 steel, said wearing bloc'khaving'a peripheral groove to receive the'yoke, a depression in oneend of the wearing block to form a seat tor the collar of a'drill steel, andaclip ion 

